Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 90 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
2. 2.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they freeze (c) they react (d) they become magnets
3. 3.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
4. 4.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
5. 5.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is sweet (c) clear water is salty (d) clear water is hot
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) how hard we shake (c) the cream temperature (d) the amount of cream
10. 10.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a magnet (c) white paper (d) a balloon
11. 11.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
12. 12.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
13. 13.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) an adult with an iron (c) turmeric powder (d) a cotton bud
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) True (b) False
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) an ingredient ran out (d) the gas froze
17. 17.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
18. 18.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) salt
23. 23.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a mirror (c) a battery cell (d) a rubber band
24. 24.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) a magnet (d) vinegar
25. 25.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) thick whipped cream (c) ice (d) powder
26. 26.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🔍 Which is the odd one out? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) melting butter
29. 29.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a bowl (c) a timer (d) a magnet
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) a battery cell (d) baking soda
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) False (b) True
33. 33.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) stem (d) roots
34. 34.🫧 Which of these is neutral? (a) detergent water (b) salt water (c) orange juice (d) vinegar
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
36. 36.True or false: seeds on wet cotton sprouts in a few days. (a) True (b) False
37. 37.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
39. 39.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
40. 40.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral

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